Posted by Mike Aylward on December 20, 2009 at 09:07:40 from (216.145.134.136):
In Reply to: Re: Bio-diesel posted by IAGary on December 20, 2009 at 06:26:59:
I agree with you wholeheartedly, IAGary. The improvement in pump lubricity alone is well worth using the 5% blend. Also, to the poster that said he was being delivered 500 ppm diesel fuel, you might want to check that. VERY, VERY few suppliers will want to risk supplying that stuff due to contamination issues. They may be telling you that is what they are delivering but it may be still be ULSD and even still, 5% blend. In this area that is what all suppliers handle due to the liability of cross contamination.
The 5% blend acts just like (and gets the same bad rap) as ethanol did when it first came out. Both fuels have solvent properties and will flush out all kinds of bacteria and crud that has built up over the years due to the old diesel fuel. A few shorter filter change intervals will usually take care of this. Fuel that has stood for a long time will make this worse. It has had longer for the anerobic bacteria to grow in it. This fuel gets topped off with 5% blend and the blend is blamed for the trouble when in fact it's the old fuel it gets dumped on. I am a professional farmer and, of course, I am a big advocate of blended soy diesel. But the benefits of longer pump life are more than enough to sell me on it. High sulfur in diesel fuel is not a lubricant in and of itself. The process of removing the sulfur causes much of the lubricity to be removed. This is easily put back by the use of the 5% blend. Sulfur is an acid and causes all kinds of trouble in an engine if it isn't properly taken care of. Be glad it's gone and not polluting your engine oil.
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